MGS 3 was a masterpiece
he forgot to mention that taking damage in combat with enemies will increase your max health total if you let the injuries heal over time.
There's a slight cutscene variation when Snake is being tortured by Volgin where if your max hp is above certain total, he says you've seen a lot of battle. If your overall hp total isn't above that threshold he makes fun of you and says you have a babies body.
love this game